import { StringOption } from '../../option/impl/string-option';
import { FormOptionSelector, OptionGroup, OptionGroupItem } from '../../option/index';
import { FormItem } from '../form-item';
import { FormItemImpl } from './form-item-impl';
export declare class MultipleChoiceItem extends FormItemImpl<string> implements OptionGroupItem<StringOption, string> {
    options: Array<FormOptionSelector<StringOption>>;
    minSelections: number;
    maxSelections: number;
    optionSubsets: Array<OptionGroup<StringOption>>;
    optionItemMap: {
        [id: string]: FormItem;
    };
}